[jira] [Created] (HBASE-20902) when WAL sync failed, we should bypass the failed DN that previously used

[chenxu (JIRA)]

chenxu created HBASE-20902:
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             Summary: when WAL sync failed, we should bypass the failed DN that 
previously used
                 Key: HBASE-20902
                 URL: https://issues.apache.org/jira/browse/HBASE-20902
             Project: HBase
          Issue Type: Bug
          Components: wal
            Reporter: chenxu


in our prod env, there happened to be a slow DN, all WAL#sync with that DN are 
failed, 

during Log rolling, we should bypass the slow DN that previously Log used.



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